Abstract

The use of abundant and inexpensive biomaterials such as agricultural by-products/wastes in the production of activated carbon has attracted considerable attention in recent years. Olive pomace (OP) is a solid waste resulting after extracting oil from olives in the olive oil production processes. OP was used as a precursor for the preparation of activated carbon as it is low-cost and abundantly available. In the experimental study, OP was chemically activated at various impregnation ratios using KOH as an activating agent. The effects of impregnation ratio and activation temperature on textural and morphological structure, surface chemistry, and surface area of prepared activated carbons were investigated. The OP-based activated carbons were characterized by SEM-EDX, BET surface area, iodine number, FTIR, pH_pzc, and elemental analysis. The activated carbons prepared had a specific surface area from 385.481 m²/g to 2451.770 m²/g, micropore volume from 0.1440 cm³/g to 0.8670 cm³/g, and mesopore volume from 0.1108 cm³/g to 0.7540 cm³/g. The increase in both activation temperature and impregnation ratio resulted in a higher specific surface area and micropore volume. Activation temperature and impregnation ratio significantly influenced the characteristics and yield of activated carbon. Based on the results obtained by the characterization studies, we can suggest that the high surface area activated carbons can be produced from olive pomace by KOH activation.

摘要

近年来，在活性炭生产中使用丰富且廉价的生物材料（例如农业副产品/废物）引起了广泛关注。橄榄果渣 (OP) 是在橄榄油生产过程中从橄榄中提取油后产生的固体废物。OP 被用作制备活性炭的前体，因为它成本低且供应充足。在实验研究中，使用 KOH 作为活化剂，以不同的浸渍比对 OP 进行化学活化。研究了浸渍比和活化温度对制备的活性炭的结构和形态结构、表面化学和表面积的影响。OP 基活性炭通过 SEM-EDX、BET 表面积、碘值、FTIR、pH _pzc进行表征, 元素分析。活性炭制备具有的比表面积从385.481米² / g至2451.770米² /克，微孔体积从0.1440厘米³ / g至0.8670厘米³ /克，和中孔从0.1108体积厘米³ / g至0.7540厘米³ /G。活化温度和浸渍率的增加导致更高的比表面积和微孔体积。活化温度和浸渍比显着影响活性炭的特性和产率。根据表征研究获得的结果，我们可以建议通过 KOH 活化从橄榄果渣中生产高表面积活性炭。